Hoses-Grommets-&-Clamps > Automotive-Brake-Lines-&-Fittings

Brake Line Fittings - 3/16" Domestic

Brake Line Fittings

Brake Line Fittings Brake Line Fittings Brake Line Union

Tube nuts, unions, and adapters have uses across different types of automotive lines. Use a tube nut to create a connection by placing it over the brake line with the threads out to the side that will be flared. A union is for joining two lines together. Be sure to match the thread and flare of your connecting lines. Adapters are used to connect your line to the port if there is a difference. With adapters, match the female side to your brake line, and match the male side to the port connection. All styles available are sold individually so you can get exactly what you need.


  • Available: Tube nuts, Unions, & Adapters.
  • Fittings sold individually.
Item Description Price
1+ I Ext. Price I 5+ Ext. Price I I 10+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
1239010 Steel Tube Nut, Long, 3/16" (3/8-24 Inverted) (1 MIN)
0.62700 0.63 I 0.57800 0.58 I 0.50100 0.50
1 EA Call
1239011 Steel Tube Nut, 3/16" (7/16-24 Inverted) (1 MIN)
1.00100 1.00 I 0.94600 0.95 I 0.79 0.79
1 EA Call
1239012 Steel Tube Nut, 3/16" (3/8-24 Inverted) (1 MIN)
0.49400 0.49 I 0.45600 0.46 I 0.39500 0.40
1 EA Call
1239103 Brass Brake Line Union, 3/16" (3/8-24 Inverted) (1 MIN)
1.19900 1.20 I 1.10600 1.11 I 1.02700 1.03
1 EA ✓

Brake Line Fittings - 1/4" Domestic

Brake Line Fittings

Brake Line Fittings Brake Line Fittings Fittings

Tube nuts, unions, and adapters have uses across different types of automotive lines. Use a tube nut to create a connection by placing it over the brake line with the threads out to the side that will be flared. A union is for joining two lines together. Be sure to match the thread and flare of your connecting lines. Adapters are used to connect your line to the port if there is a difference. With adapters, match the female side to your brake line, and match the male side to the port connection. All styles available are sold individually so you can get exactly what you need.


  • Available: Tube nuts, Unions, & Adapters.
  • Fittings sold individually.
Item Description Price
1+ I Ext. Price I 5+ Ext. Price I I 10+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
1239016 Steel Tube Nut, Long, 1/4" (7/16-24 Inverted) (1 MIN)
0.81100 0.81 I 0.76600 0.77 I 0.72700 0.73
1 EA ✓
1239013 Steel Tube Nut, 1/4" (7/16-24 Inverted) (1 MIN)
0.62300 0.62 I 0.57500 0.57 I 0.49800 0.50
1 EA ✓
1239104 Brass Brake Line Union, 1/4" (7/16-24 Inverted) (1 MIN)
1.19100 1.19 I 1.09900 1.10 I 1.02100 1.02
1 EA ✓

Brake Line Fittings - 5/16"-3/8" Domestic

Brake Line Fittings

Brake Line Fittings Line Fittings Brake Line Fittings Brake Line Union Line Fittings

Tube nuts, unions, and adapters have uses across different types of automotive lines. Use a tube nut to create a connection by placing it over the brake line with the threads out to the side that will be flared. A union is for joining two lines together. Be sure to match the thread and flare of your connecting lines. Adapters are used to connect your line to the port if there is a difference. With adapters, match the female side to your brake line, and match the male side to the port connection. All styles available are sold individually so you can get exactly what you need.


  • Available: Tube nuts, Unions, & Adapters.
  • Fittings sold individually.
Item Description Price
1+ I Ext. Price I 5+ Ext. Price I I 10+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
1239014 Steel Tube Nut, 5/16" (1/2-20 Inverted) (1 MIN)
0.81100 0.81 I 0.76600 0.77 I 0.64 0.64
1 EA ✓
1239105 Brass Brake Line Union, 5/16" (1/2-20 Inverted) (1 MIN)
1.51100 1.51 I 1.36600 1.37 I 1.23200 1.23
1 EA ✓
1239015 Steel Tube Nut, 3/8" (5/8-18 Inverted) (1 MIN)
0.78600 0.79 I 0.70800 0.71 I 0.63700 0.64
1 EA ✓
1239106 Brass Brake Line Union, 3/8" (5/8-18 Inverted) (1 MIN)
2.56700 2.57 I 2.42200 2.42 I 2.02900 2.03
1 EA ✓

Brake Line Fittings - International

Brake Line Fittings

Brake Line Fittings Brake Line Union Fittings

Tube nuts, unions, and adapters have uses across different types of automotive lines. Use a tube nut to create a connection by placing it over the brake line with the threads out to the side that will be flared. A union is for joining two lines together. Be sure to match the thread and flare of your connecting lines. Adapters are used to connect your line to the port if there is a difference. With adapters, match the female side to your brake line, and match the male side to the port connection. All styles available are sold individually so you can get exactly what you need.


  • Available: Tube nuts, Unions, & Adapters.
  • Fittings sold individually.
Item Description Price
1+ I Ext. Price I 5+ Ext. Price I I 10+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
1239040 Japanese Std Steel Tube Nut, 3/16" (M10 x 1.0 Inverted) (1 MIN)
0.88800 0.89 I 0.79900 0.80 I 0.72 0.72
1 EA ✓
1239109 Japanese Std Steel Brake Line Union, 3/16" (M10 x 1.0 Inverted) (1 MIN)
4.12 4.12 I 3.80300 3.80 I 3.53200 3.53
1 EA ✓
1239039 European Std Steel Tube Nut, 3/16" (M10 x 1.0 Bubble) (1 MIN)
1.14800 1.15 I 1.05900 1.06 I 0.98400 0.98
1 EA ✓
1239108 European Std Steel Brake Line Union, 3/16" (M10 x 1.0 Bubble) (1 MIN)
3.99900 4.00 I 3.69100 3.69 I 3.19900 3.20
1 EA ✓

Brake Line Fittings - Adapters

Brake Line Adapters

Brake Line Adapters Brake Line Fittings

Tube nuts, unions, and adapters have uses across different types of automotive lines. Use a tube nut to create a connection by placing it over the brake line with the threads out to the side that will be flared. A union is for joining two lines together. Be sure to match the thread and flare of your connecting lines. Adapters are used to connect your line to the port if there is a difference. With adapters, match the female side to your brake line, and match the male side to the port connection. All styles available are sold individually so you can get exactly what you need.


  • Available: Tube nuts, Unions, & Adapters.
  • Fittings sold individually.
Item Description Price
1+ I Ext. Price I 5+ Ext. Price I I 10+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
1239219 Brass Adapter, 1/4", Female (7/16-24 Inverted), Male (1/2-20 Inverted) (1 MIN)
5.00600 5.01 I 4.62 4.62 I 4.29 4.29
1 EA ✓
1239220 Brass Adapter, 3/16", Female (3/8-24 Inverted), Male (1/2-20 Inverted) (1 MIN)
4.70800 4.71 I 4.34600 4.35 I 4.03500 4.04
1 EA ✓
1239222 Brass Adapter, 3/16", Female (3/8-24 Inverted), Male (7/16-24 Inverted) (1 MIN)
2.77400 2.77 I 2.60800 2.61 I 2.18400 2.18
1 EA ✓
1239225 Brass Adapter, 1/4" Female (7/16-24 Inverted), Male (9/16-18 Inverted) (1 MIN)
4.19200 4.19 I 3.96400 3.96 I 3.30200 3.30
1 EA ✓
1239228 Brass Adapter, 3/16", Female (3/8-24 Inverted), Male (9/16-18 Inverted) (1 MIN)
4.19200 4.19 I 3.96400 3.96 I 3.30200 3.30
1 EA ✓
Prop65 Warning